<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 表单 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: "",
        password: ""
      },
      // 登录表单验证
      loginFormRules: {
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          {
            min: 1,
            max: 16,
            message: "密码长度在 1 到 16 个字符",
            trigger: "blur"
          }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 6,
            max: 16,
            message: "密码长度在 6 到 16 个字符",
            trigger: "blur"
          }
        ]
      }
    };
  },
  methods: {
    resetLoginForm() {
      //   console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        console.log(valid);
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.post("login", this.loginForm);
        console.log(res);
        if (res.meta.status!=200) {
          return this.$message.error('登录失败！');
        }
        this.$message.success('登录成功！');
        //将登录成功之后的token保存到客户端的sessionStorage中
        //项目中除了登录之外的其他接口，必须在登录之后才能访问
        //token只应该在当前网站的打开期间有效，所以应该将token保存在sessionStorage中
        window.sessionStorage.setItem('token',res.data.token);
        //通过编程式导航跳转到后台主页，地址是/home
        this.$router.push('/home');
      });
    }
  }
};
</script>
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
